﻿using System;
using System.Collections.Generic;
using System.Text;
using System.Web;
using System.Xml;
using System.IO;
using System.Net;
using System.Text.RegularExpressions;
using NetOpen_System.Component.QQWry;

namespace NetOpen_System.Component
{
    public sealed class WebsiteSkipHttpModule : IHttpModule
    {
        #region IHttpModule 成员

        public void Dispose()
        {
        }

        public void Init(HttpApplication context)
        {
            context.BeginRequest += new EventHandler(context_BeginRequest);
        }


        #endregion


        void context_BeginRequest(object sender, EventArgs e)
        {
            try
            {

                //if (HttpContext.Current.Request.IsLocal)//忽略本地计算机请求
                //    return;

                //string ip = HttpContext.Current.Request.UserHostAddress;
                //string ip = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"].ToString();
                string ip = string.Empty;
                if (HttpContext.Current.Request.ServerVariables["HTTP_X_REAL_IP"] != null)
                {
                    ip = HttpContext.Current.Request.ServerVariables["HTTP_X_REAL_IP"].ToString();
                }
                else if (HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"] != null)
                {
                    ip = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"].ToString();
                }
                else if (HttpContext.Current.Request.ServerVariables["HTTP_VIA"] != null)
                {
                    ip = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"].ToString();
                }
                else
                {
                    ip = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"].ToString();
                }
              

                QQWryLocator qqWry = new QQWryLocator(HttpContext.Current.Server.MapPath(@"~\IpData\qqwry.dat"));

                IPLocation ipaddress = qqWry.Query(ip);  //查询一个IP地址

                string ls_city = ipaddress.Country;
                string ls_urlfrom = string.Empty;
                string ls_urlto = string.Empty;
                string ls_url = HttpContext.Current.Request.Url.AbsoluteUri;
                string ls_useragentkeyword = string.Empty;
             
                ExcludeUserAgentMatchEngine Em = WebsiteSkipConfiguration.GetConfig().ExcludeUserAgents;

                if(Em.ExcludeUserAgentList.Count > 0)
                {
                    foreach (ExcludeUserAgent ua in Em.ExcludeUserAgentList)
                    {
                        if (HttpContext.Current.Request.UserAgent.Contains(ua.keyword))
                        {
                            return;
                        }
                    }
                }

                UrlMatchEngine pu = WebsiteSkipConfiguration.GetConfig().SkipedUrls;

                if (pu.UrlList.Count > 0)
                {
                    foreach (SkipedUrl sk in pu.UrlList)
                    {
             
                        if (ls_city.Contains(sk.IpCity))
                        {
                            if (sk.UrlFrom.Length > 0)
                            {
                                if (sk.UrlFrom.Contains(ls_url) && !ls_url.Contains(sk.OutKeyWord))
                                {
                                    if (sk.UrlTo.Length > 0)
                                    {
                                        HttpContext.Current.Response.Redirect(sk.UrlTo, true);
                                    }
                                    break;
                                }
                               
                            }

                            break;
                        }
                    }
                }

                if (WebsiteSkipConfiguration.GetConfig().IpChecks.GetIpIn(ip))
                {
                    ls_urlfrom = WebsiteSkipConfiguration.GetConfig().IpChecks.UrlFrom.Trim();
                    ls_urlto = WebsiteSkipConfiguration.GetConfig().IpChecks.UrlTo.Trim();
                    if (ls_urlfrom.Length > 0)
                    {

                        if (ls_urlfrom.Contains(ls_url) && !ls_url.Contains(WebsiteSkipConfiguration.GetConfig().IpChecks.OutKeyWord))
                        {
                            if (ls_urlto.Length > 0)
                            {
                                HttpContext.Current.Response.Redirect(ls_urlto, true);
                            }
             
                        }

                   
                    }
                }
             
                
            }
            catch
            {

            }
        }
    }
}
